java io IOException File user hadoop could only be replicated to 0 nodes instead of 1

Question

I am trying to upload file in my hdfs cluster from client, but It shows me the below error. 

java.io.IOException: File /user/hadoop could only be replicated to 0 nodes, instead of 1
at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.getAdditionalBlock(FSNamesystem.java:1448)
at org.apache.hadoop.hdfs.server.namenode.NameNode.addBlock(NameNode.java:690)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.apache.hadoop.ipc.WritableRpcEngine$Server.call(WritableRpcEngine.java:342)
at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:1350)
at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:1346)
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.Subject.doAs(Subject.java:396)
at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:742)
at org.apache.hadoop.ipc.Server$Handler.run(Server.java:1344)

How can I solve this error?

Answer 1

Hi@akhtar,

To avoid this error, follow the bellow given steps.

• Stop all hadoop services

• Delete dfs/name and dfs/data directories

• Run hadoop namenode -format  -Y

• Start hadoop services again

Hope these steps will help you.